MLA

Bentley, R. (Richard), 1708-1782, artist. Design (not executed) of a Gothic columbarium at the Vine [sic]. East end [art original].. [1757?]. https://collections.library.yale.edu/catalog/16193324.

APA, 6th edition

Bentley, R. (Richard), 1708-1782, artist. ([1757?])[Design (not executed) of a Gothic columbarium at the Vine [sic]. East end [art original].]. https://collections.library.yale.edu/catalog/16193324.